package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.fasterxml.jackson.databind.ser.Serializers;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @PostMapping ("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据+"+shoppingCart);
        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        //查询当前菜品或者套是否在购物车中，如果在，直接数量增加，不需要重新增加一条数据
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        if(dishId!=null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else {
            //是套餐
            Long setmealId = shoppingCart.getSetmealId();
            queryWrapper.eq(ShoppingCart::getSetmealId,setmealId);
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
       //如果存在，数量加一
        if (cartServiceOne!=null){
            Integer number = cartServiceOne.getNumber();
            cartServiceOne.setNumber(number+1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //如果不在，直接添加购物车
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }

        return R.success(cartServiceOne);
    }

    @PostMapping ("/sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart){
        log.info("购物车数据+"+shoppingCart);
        //设置用户id，指定当前是哪个用户的购物车数据
        Long currentId = BaseContext.getCurrentId();
        shoppingCart.setUserId(currentId);
        //查询当前菜品或者套是否在购物车中，如果在，直接数量增加，不需要重新增加一条数据
        Long dishId = shoppingCart.getDishId();
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,currentId);
        queryWrapper.eq(ShoppingCart::getDishId,dishId);
        if(dishId!=null){
            //添加到购物车的是菜品
            queryWrapper.eq(ShoppingCart::getDishId,dishId);

        }else {
            //是套餐
            Long setmealId = shoppingCart.getSetmealId();
            queryWrapper.eq(ShoppingCart::getSetmealId,setmealId);
        }
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        Integer number = cartServiceOne.getNumber();
        //如果大于一，数量减一
        if (number>1){

            cartServiceOne.setNumber(number-1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            //如果数量为一，从购物车删除

            shoppingCartService.remove(queryWrapper);
            //   cartServiceOne=shoppingCart;
        }

        return R.success(shoppingCart);
    }

    //删除购物车
    @DeleteMapping("/clean")
    public R<String> clean(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        shoppingCartService.remove(queryWrapper);

        return R.success("清空成功");
    }


//查看购物车
    @GetMapping("/list")
    public R<List<ShoppingCart>> cartData(){
        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);
        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);
        return R.success(list);
    }




}
